JP6650352B2 - Railway vehicle bogie assembly method and wheelbase fixing jig used therefor - Google Patents

Description

  The present invention relates to a method for assembling a bogie for a railway vehicle and a jig for fixing the wheelbase.

  Patent Literature 1 proposes a bogie in which a side beam is omitted from a bogie frame of a bogie of a railway vehicle. In the bogie, a pair of axle boxes spaced apart in the longitudinal direction of the vehicle support both ends of the leaf spring, and a central portion of the leaf spring supports a cross beam of the bogie frame. That is, the leaf spring has both the function of the primary suspension and the function of the conventional side beam. The cross beam has a pressing member at both ends in the vehicle width direction, and the pressing member is removably mounted on the center of the leaf spring.

International Publication No. 2013/008468

  In the bogie of Patent Document 1, the leaf spring is not fixed to the bogie frame and the axle box. Therefore, at the time of assembling the bogie, the pair of axles are arranged in parallel while maintaining the wheelbase of the pair of axles as designed. Therefore, it is necessary to appropriately measure the wheelbase using a tape measure or the like, which complicates the operation.

  Therefore, an object of the present invention is to simplify the work of maintaining the wheelbase as designed at the time of assembling the bogie.

  The method for assembling a railway vehicle bogie according to one aspect of the present invention is characterized in that the wheelbase fixing jig extending in the vehicle longitudinal direction is fixed to a pair of axle box devices arranged apart in the vehicle longitudinal direction, A positioning step of positioning the pair of axle box devices so that the wheelbase of the pair of wheel sets respectively supported by the pair of axle box devices is a predetermined design value, and extending in the vehicle longitudinal direction to the pair of axle box devices. A leaf spring disposing step of supporting the leaf spring, and a bogie frame disposing step of supporting a bogie frame at a longitudinal center portion of the leaf spring and connecting the bogie frame to the pair of axle box devices.

  A wheelbase fixing jig for assembling a railway vehicle bogie according to one embodiment of the present invention positions a pair of axle box devices spaced apart in the vehicle longitudinal direction to support a leaf spring extending in the vehicle longitudinal direction. A jig for fixing the wheelbase, comprising a pair of locking portions extending in the longitudinal direction of the vehicle and locked to the pair of axle box devices at both ends in the longitudinal direction.

  According to the method and configuration, at the time of assembling the bogie, in a state before the leaf spring and the bogie frame are assembled, only the wheelbase fixing jig extending in the vehicle longitudinal direction is locked to the pair of axle box devices, The wheelbase of the pair of wheel sets is maintained as designed. Therefore, when the pair of axle box devices separated in the longitudinal direction of the vehicle supports the leaf springs extending in the longitudinal direction of the vehicle, the operation of maintaining the wheelbase as designed can be simplified.

  ADVANTAGE OF THE INVENTION According to this invention, the operation | work which maintains a wheelbase as a design value at the time of a truck assembly can be simplified.

It is a side view of the railcar bogie concerning embodiment. FIG. 2 is a vertical sectional view of a main part of the bogie shown in FIG. 1. FIG. 2 is a cross-sectional view of a cylindrical portion of the shaft beam shown in FIG. (A)-(c) is a drawing explaining the assembly procedure of a cart.

  Hereinafter, embodiments will be described with reference to the drawings. In the following description, the direction in which the railway vehicle travels and the direction in which the vehicle body extends is defined as the vehicle longitudinal direction, and the lateral direction orthogonal to the vehicle longitudinal direction is defined as the vehicle width direction. The longitudinal direction of the vehicle is also referred to as the front-rear direction, and the vehicle width direction is also referred to as the left-right direction.

  FIG. 1 is a side view of a bogie 1 of a railway vehicle according to the embodiment. FIG. 2 is a vertical sectional view of a main part of the bogie 1 shown in FIG. FIG. 3 is a cross-sectional view of the cylindrical portion 14a of the shaft beam 14 shown in FIG. As shown in FIG. 1, a bogie 1 for a railway vehicle includes a bogie frame 4 that supports a vehicle body via an air spring 2 serving as a secondary suspension and a bolster 3. The bogie frame 4 includes a cross beam 5 extending in the vehicle width direction and supporting a vehicle body (not shown), but does not include a so-called side beam.

  The cross beam 5 is rotatably connected to the bolster 3, and the bolster 3 is connected to the vehicle body via the air spring 2 and a bolster anchor (not shown). A pair of wheel shafts 6 are arranged on both sides of the cross beam 5 in the vehicle longitudinal direction. The wheel axle 6 has an axle 6a extending along the vehicle width direction, and wheels 6b provided on both sides in the vehicle width direction of the axle 6a. The portions on both sides in the vehicle width direction of the axle 6a are rotatably supported by bearings 7, respectively. The bearings 7 are accommodated in a shaft box 9 of a shaft box device 8.

  The axle box device 8 supports an end 10b of a leaf spring 10 extending in the vehicle longitudinal direction. A central portion 10a in the longitudinal direction of the leaf spring 10 supports an end portion 5a of the cross beam 5 in the vehicle width direction. That is, the leaf spring 10 has both the function of the primary suspension and the function of the conventional side beam. The leaf spring 10 is formed of, for example, a fiber reinforced resin. The leaf spring 10 is formed in a bow shape that is convex downward as a whole in a side view. The central portion 10a of the leaf spring 10 is located below each end 10b and has a downwardly convex arc shape.

  As shown in FIGS. 1 and 2, the bogie frame 4 is provided with a pressing member 11 provided below the end 5 a of the cross beam 5, and on both sides of the pressing member 11 in the vehicle width direction, below the end 5 a of the cross beam 5 and the vehicle. It has a pair of side walls 12 protruding on both sides in the longitudinal direction. The central portion 10 a of the leaf spring 10 is located below the pressing member 11. The leaf spring 10 passes through the space between the pair of side walls 12 in the vehicle longitudinal direction. The leaf spring 10 is disposed with a gap in the vehicle width direction from the side wall 12. The central portion 10a of the leaf spring 10 is arranged at a position overlapping the side wall 12 in a side view.

  The pressing member 11 has an arc-shaped lower surface 11a, and the pressing member 11 is placed on the central portion 10a of the leaf spring 10 from above. The pressing member 11 presses the upper surface of the leaf spring 10 so as to be able to be separated by a downward load due to gravity from the cross beam 5 without being fixed to the leaf spring 10. That is, the pressing member 11 presses the upper surface of the leaf spring 10 without being connected to the leaf spring 10 by a fixture (for example, a bolt or the like). In other words, due to the downward load caused by the gravity from the cross beam 5 and the reaction force of the leaf spring 10 against it, the pressing of the pressing member 11 against the upper surface of the leaf spring 10 is maintained. This allows the leaf spring 10 to swing while changing the pressing area with respect to the lower surface 11 a of the pressing member 11. The bogie frame 4 may be placed directly on the upper surface of the central portion 10a of the leaf spring 10 or may be placed indirectly. A buffer sheet may be interposed between the pressing member 11 and the leaf spring 10.

  As shown in FIGS. 1 and 3, the axle box device 8 includes an axle box 9, a shaft beam 14, a mandrel 15, and an elastic bush 16. That is, the carriage 1 is a so-called beam-type carriage. The upper surface of the axle box 9 is inclined toward the center in the longitudinal direction. A spring seat 17 is attached to an upper part of the axle box 9, and an end 10 b of a leaf spring 10 extending in the vehicle longitudinal direction is mounted on the spring seat 17 so as to be separated from the spring seat 17 without being fixed from above. That is, the ends 10 b on both sides in the longitudinal direction of the leaf spring 10 are supported by the shaft box 9 via the spring seat 17. The spring seat 17 includes an elastic body 18 (for example, laminated rubber) positioned on the upper surface of the shaft box 9 and a receiving member 19 positioned on the elastic body 18 and on which the end 10b of the leaf spring 10 is mounted. Prepare. The leaf spring 10 and the receiving member 19 are not fixed to each other.

  The axle beam 14 extends in the longitudinal direction of the vehicle from the axle box 9 toward the center of the bogie, and a distal end thereof is provided with a cylindrical portion 14a that opens toward both sides in the vehicle width direction. The cylindrical portion 14a is formed by fixing another half-cylindrical portion with a bolt to a half-cylindrical portion integrally formed at the tip of the shaft beam 14. The mandrel 15 is inserted through the internal space of the cylindrical portion 14a in the vehicle width direction. The mandrel 15 protrudes outward in the vehicle width direction from both side surfaces of the cylindrical portion 15a, a pair of conical flange portions 15b provided on both sides in the vehicle width direction of the cylindrical portion 15a, and the pair of flange portions 15b. And a protruding end 15c.

  A cylindrical elastic bush 16 (for example, a rubber bush) is interposed between the mandrel 15 and the cylindrical portion 14a. The elastic bush 16 has a cylindrical portion 16a, and a pair of flange portions 16b projecting radially outward from both sides in the vehicle width direction of the cylindrical portion 16a, and is fitted to the mandrel 15 outside. Each end 15c of the mandrel 15 protrudes in the vehicle width direction from the cylindrical portion 14a of the shaft beam 14.

  The side wall 12 is formed with a groove 12a that opens downward. The groove 12a is fitted into the end 15c of the shaft 15 from above. In this state, the cover member 20 is fixed to the side wall 12 from below by a bolt (not shown) so as to close the lower opening of the groove 12 a, and the mandrel 15 is sandwiched between the side wall 12 and the cover member 20. Thereby, the mandrel 15 is connected to the bogie frame 4.

  Next, characteristic items in the assembling procedure of the cart 1 will be described. In assembling the bogie, an operation of mounting the bogie frame 4 on the axle box device 8 including the wheel axle 6 and the axle beam 14 (hereinafter, simply referred to as “vehicle insertion”) is performed. Here, the bogie 1 provided with the leaf spring 10 of the present embodiment has a characteristic structure as compared with the conventional bogie, and therefore, depending on the conventional adjusting method, it is difficult to adjust the axle distance and put in the car. It took a lot of effort. Hereinafter, the details will be described.

  In the car insertion, each end 15c of the mandrel 15 attached to the tip end of the shaft beam 14 via the elastic bush 16 is fitted to the groove 12c of the side wall 12 of the bogie frame 4 and fastened. In a conventional beam-type bogie having a side beam and a shaft spring, the shaft spring is compressed to a height at which an empty vehicle load is applied, and the mandrel is fitted into the groove of the bogie frame while being restrained at that height. At this time, if the arm of the shaft beam is held at a position that is substantially horizontal, the fitting operation can be performed with an appropriate shaft distance.

  On the other hand, in the bogie 1 of the present embodiment, it is difficult to compress and restrain the leaf spring 10 having the function of the axial spring to a height at which an empty load is applied. In this state, it is necessary to mount the bogie frame 4. Therefore, in order to fit the mandrel 15 to the bogie frame 4, it is necessary to raise the tip of the shaft beam 14 upward. As a result, the shaft beam 14 is rotated around the axle 6a, and the position of the spring seat 17 is changed accordingly.

  Here, in the bogie 1 of the present embodiment, the position adjustment between the leaf spring 10 and the bogie frame 4 matches the center position of the leaf spring 10 with the center position of the bogie frame 4 in a side view, and adjusts the position of each leaf spring 10. This is performed by making the gaps in the vehicle longitudinal direction of the clearances (all four locations of one bogie) formed in the vehicle longitudinal direction between the longitudinal end and the spring seat 17. However, as described above, when the mandrel 15 of the axle box device 8 is fitted or fastened to the bogie frame 4, the shaft beam 14 rotates, and the longitudinal end of the leaf spring 10 and the spring seat 17 are rotated. And the gap between them will change. Therefore, adjusting the position of the leaf spring 10 and the bogie frame 4 requires a dimensional management operation to make the gaps of all four locations coincide with each other, so that a lot of labor and time are required for the inserting operation.

  Therefore, in the present embodiment, the use of the wheelbase fixing jig 40 can significantly reduce the above-described car-in operation.

  4 (a) to 4 (c) are drawings for explaining the procedure for assembling the cart. As shown in FIG. 4A, the worker arranges a pair of axle box devices 8 supporting the wheel axle 6 in a state where the leaf spring 10 and the bogie frame 4 are not provided, and separates the pair of axle box devices 8 in the longitudinal direction of the vehicle. The cylindrical portion 14a of the shaft box device 8 is supported from below by the installed support jig 30. In a state where the cylindrical portion 14a is supported by the support jig 30, the shaft beam 14 extends horizontally from the shaft box 9 toward the center of the bogie. In this state, the pair of axle box devices 8 is positioned using the axle fixing jig 40.

  The wheelbase fixing jig 40 is a plate-like body that extends in the longitudinal direction of the vehicle and is used in a posture in which the plate surface faces the vehicle width direction. A marking M1 (for example, a hole) is provided at a central portion 40a in the longitudinal direction of the wheelbase fixing jig 40. A pair of end portions 40b on both sides in the longitudinal direction of the wheelbase fixing jig 40 are formed with concave locking portions 40c that are cut out so as to open downward. The locking portion 40c has a shape that fits the end 15c of the mandrel 15 when viewed from the vehicle width direction. An annular grip portion 40e that can be gripped by an operator is formed at a portion of the wheelbase fixing jig 40 between the central portion 40a and the end portion 40b.

  The operator locks the wheelbase fixing jig 40 to the pair of axle box devices 8 by fitting the locking portions 40c of the wheelbase fixing jig 40 to the ends 15c of the mandrel 15 from above. Then, the pair of axle box devices 8 is positioned, and the axle distance (that is, the distance between the pair of wheel shafts 6 in the longitudinal direction of the vehicle) matches a predetermined design value (positioning step).

  Next, as shown in FIG. 4B, a wedge-shaped wheel stopper 50 is pressed against each wheel 6 b to fix the wheelbase separately from the wheelbase fixing jig 40. Then, the pair of axle box devices 8 support the leaf springs 10 extending in the vehicle longitudinal direction (leaf spring arrangement step). Specifically, the end 10b of the leaf spring 10 is placed on the spring seat 17 provided on the upper part of the axle box 9 of the axle box device 8 from above. In this state, the central portion 40a of the wheelbase fixing jig 40 is disposed along the side surface 10c on the outer side in the vehicle width direction of the central portion 10a of the leaf spring 10. That is, in the present embodiment, the central portion 40a of the wheelbase fixing jig 40 is the spring proximity portion.

  When viewed from the vehicle width direction, at least a part of the side surface 10c of the central portion 10a of the leaf spring 10 protrudes vertically from the wheelbase fixing jig 40. On the side surface 10c of the leaf spring 10, a marking M2 (for example, a score line extending in the vertical direction) is provided at the center in the longitudinal direction of the leaf spring 10 as a marking corresponding to the marking M1 of the wheelbase fixing jig 40. ing. When viewed from the vehicle width direction, the marking M <b> 2 of the leaf spring 10 protrudes vertically from the wheelbase fixing jig 40.

  The marking M1 of the wheelbase fixing jig 40 is located at the center between the pair of locking portions 40c. That is, if the marking M1 of the wheelbase fixing jig 40 and the marking M2 of the leaf spring 10 match at a position in the vehicle longitudinal direction, the leaf spring 10 is installed at an appropriate position with respect to the pair of axle box devices 8. It will be. Therefore, the operator visually checks whether or not a positional displacement in the vehicle longitudinal direction has occurred between the marking M1 of the wheelbase fixing jig 40 and the marking M2 of the leaf spring 10 (a positional displacement confirmation step). If the displacement has occurred, the position of the leaf spring 10 in the longitudinal direction of the vehicle is adjusted. If the displacement has not occurred, the process proceeds to the next step.

  Next, as shown in FIG. 4C, the wheelbase fixing jig 40 is removed from the mandrel 15, and the bogie frame 4 is supported by the central portion 10a of the leaf spring 10. Specifically, the bogie frame 4 is placed on the central portion 10a of the leaf spring 10 so as to be separated from above, and the groove 12a of the side wall 12 of the bogie frame 4 is fitted into the end 15c of the mandrel 15 from above. At this time, since the wheelbase is properly set in advance by the wheelbase fixing jig 40, it is not necessary to finely adjust the position of the wheel shaft 6 in accordance with the bogie frame 4, and the bogie frame 4 and the leaf spring 10 Is also suppressed in the longitudinal direction of the vehicle. From this state, the bogie frame 4 is connected to the pair of axle box devices 8 by fixing the lid member 20 (see FIG. 1) to the side wall 12 with bolts so as to close the lower opening of the groove 12a (bogie). Frame placement step).

  As described above, at the time of assembling the bogie 1, before the leaf spring 10 and the bogie frame 4 are assembled, the wheelbase fixing jig 40 extending in the vehicle longitudinal direction is attached to the pair of axle box devices 8. The wheelbase of the trolley 1 is maintained as designed only by locking. Therefore, when the pair of axle box devices 8 separated in the longitudinal direction of the vehicle supports the leaf springs 10 extending in the longitudinal direction of the vehicle, the operation of maintaining the wheelbase at the designed value can be simplified.

  Further, since the wheelbase fixing jig 40 is locked to the mandrel 15, the axle box device 8 does not need to be provided with a special member for locking the wheelbase fixing jig 40, and the structure of the bogie 1 is simplified. Can be In addition, since the wheelbase fixing jig 40 and the leaf spring 10 are provided with the markings M1 and M2, the positional deviation of the leaf spring 10 with respect to the pair of axle box devices 8 can be easily confirmed.

  Note that the present invention is not limited to the above-described embodiment, and its configuration can be changed, added, or deleted. For example, the markings M1 and M2 do not have to be located at the center of the wheelbase fixing jig 40 and the leaf spring 10 in the vehicle longitudinal direction, and when the marking M1 and the marking M2 match in the vehicle longitudinal direction, the leaf spring Any configuration may be used as long as 10 is arranged at a correct position. The markings M1 and M2 are not limited to score lines or holes, but may be in other forms (for example, punch marks or notches). Further, the cart 1 is a beam-type cart, but may be another type of cart. The cart 1 is a cart with a bolster, but may be a bolsterless cart.

Reference Signs List 1 cart 4 cart frame 6 wheel axle 8 axle box device 9 axle box 10 leaf spring 14 axle beam 14a cylindrical portion 15 mandrel 16 elastic bush 40
40c Locking part M1, M2 Marking

Claims (5)

By locking a wheelbase fixing jig extending in the vehicle longitudinal direction to a pair of axle box devices arranged apart in the vehicle longitudinal direction, a pair of wheel shafts respectively supported by the pair of axle box devices. A positioning step of positioning the pair of axle box devices so that the distance is a predetermined design value;
A leaf spring disposing step of supporting the leaf spring extending in the vehicle longitudinal direction on the pair of axle box devices,
A truck frame disposing step of supporting a truck frame at a central portion in the longitudinal direction of the leaf spring and connecting the truck frame to the pair of axle box devices. The axle box device includes an axle box in which a bearing for supporting the wheel set is accommodated, and an axial beam extending from the axle box in a longitudinal direction of the vehicle and having a cylindrical portion provided at an end thereof and opening toward both sides in the vehicle width direction. And a mandrel inserted in the interior space of the tubular portion in the vehicle width direction, and an elastic bush interposed between the tubular portion and the mandrel,
In the positioning step, the wheelbase fixing jig is locked to an end of the mandrel of the pair of axle box devices,
The method for assembling a railway vehicle bogie according to claim 1, wherein in the bogie frame disposing step, the bogie frame is connected to the mandrel of the pair of axle box devices.   After the leaf spring disposing step and before the bogie frame disposing step, a position deviation confirming step for confirming whether or not there is a positional deviation in the vehicle longitudinal direction between the wheelbase fixing jig and the leaf spring. The method for assembling a railway vehicle bogie according to claim 1 or 2, further comprising: A wheelbase fixing jig for positioning a pair of axle box devices arranged apart in the vehicle longitudinal direction to support a leaf spring extending in the vehicle longitudinal direction,
A wheelbase fixing jig for assembling a railcar bogie, comprising a pair of locking portions extending in a longitudinal direction of the vehicle and locked to the pair of axle box devices at both ends in the longitudinal direction. A spring proximity portion disposed between the pair of locking portions along a side surface of the leaf spring on the outside in the vehicle width direction;
The wheelbase for assembling a railway vehicle bogie according to claim 4, wherein a marking corresponding to a marking provided on the side surface of the leaf spring is attached to a side surface of the spring proximity portion on the outer side in the vehicle width direction. fixing jig.

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